Compilare: user.cpp: In function ‘int main()’: user.cpp:67:15: warning: variable ‘d’ set but not used [-Wunused-but-set-variable] int t,n,k,d; ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^